The article bellow gives a study on the Japanese national reasons and purposes of giving presents,occasions,ways and taboos as well as characteristics of giving presents so as to indicate the Japanese national characters of strong view of moral principles,intensive face-saving concept and pursuing beauty in form.

Analysis on Age Structure of Scientific and Research Staff in Domestic Environmental Protection Field;

Analysis of mental health in adult orthodontic patients of different age;

Meta Analysis of the Relationship between Age and HBsAg Positive Rate among Entry-exit People;